Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB2SI callsign genealogy
Currently held by LIRTZMAN, SOLOMON J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KB2SI's current licensee, walking backwards.
- Lirtzman, Robert FNYgranted 2008-06-30cancelled 2013-06-04
Successor callsigns
Callsigns held now by people who previously held KB2SI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB2SI, oldest first.
- LIRTZMAN, SOLOMON J NY2013-01-22 → cancelled 2013-03-02
- Lirtzman, Robert F NY2023-03-07 active